These are thoroly mixed and then filtered under pressure and tanked and aged.
The different grades of varnish depend upon the treatment of the oil, the proportion of oil and turpentine, the qualities of the gums, the aging, etc.

Some by rubbing give a very high polish, some give a dull waxy finish, some are for out-of-door use, as Spar varnish and carriage varnish, some are for floors, some for furniture, some are high priced, some are cheap.
Process of Varnishing.

The preliminary processes are the same as those for applying shellac, i.e., the surface of the wood must be perfectly even and smooth, and the staining, filling, and drying complete.

Quick drying varnishes, like shellac, are applied, with but little on the brush.

The heavy, high lustre varnishes, on the other hand, are applied with the brush full so that the varnish may even drip off the work.